VARIABLE COMPRESSION RATIO INTERNAL COMBUSTION ENGINE WITH TWO MIXING ZONES NOTABLY FOR A MOTOR VEHICLE AND METHOD OF INJECTION FOR SUCH A VEHICLE

摘要

Variable compression ratio direct-injection internal combustion engine comprising at least one cylinder (10) a cylinder head (12) bearing a fuel injection means (14) spraying fuel in a single layer (34) of fuel jets (36) a piston (16) sliding in this cylinder and a combustion chamber (32) delimited on one side by the top face (42) of the piston comprising a pip (46) rising up toward the cylinder head and arranged at the centre of a concave bowl (44). According to the invention the combustion chamber comprises at least two mixing zones (Z1 Z2) into which the fuel jets (36) are injected one of the zones (Z1) being used for a maximum compression ratio (Tmax) and the other (Z2) of the zones being used for a minimum compression ratio (Tmin).